Powdered yam refers to the Chinese herb yam, which is not recommended for adults to replenish the spleen and stomach by eating it every day without the guidance of a physician. Yam is sweet in taste and flat in nature, belonging to the spleen, lung and kidney meridians. It has the efficacy of benefiting qi and nourishing yin (replenishing qi and nourishing yin fluids), tonifying the spleen, lungs and kidneys, fixing essence and stopping leucorrhoea (stabilizing the kidney essence and stopping leucorrhoea). There are many reasons for spleen and stomach disharmony, such as dietary disorders, liver-stomach disharmony (disharmony between the functions of the ascending liver and descending stomach and internal organs), over-exertion, and mismanagement and mis-treatment, etc. Specific treatments vary from person to person depending on the symptoms. Yam nourishes yin and can help dampness, dampness in the fullness (too much dampness leads to fullness and discomfort in the spleen and stomach) or have stagnation, solid evil people should not take. Therefore, not everyone can eat it every day. Therefore, although yam has the effect of tonifying the spleen and stomach, it is not recommended to use the medicine at will on your own, and it is recommended to take it under the guidance of a doctor to make sure that the symptoms match.